Marine diagnostic software is specialized software designed for diagnosing and maintaining the engines and systems of marine vessels, including boats, yachts, and ships. Much like auto and truck diagnostic software, marine diagnostic software interfaces with the onboard diagnostic (OBD) systems of marine engines and other crucial components.

Key features of marine diagnostic software include:

1. **Engine Diagnostics:** Marine diagnostic software allows users to perform comprehensive diagnostics on the marine engine. It can read and interpret diagnostic trouble codes (DTCs) to identify issues or malfunctions.

2. **Real-time Data Monitoring:** Users can monitor real-time data from various sensors and systems in the marine vessel. This includes information related to engine performance, fuel consumption, temperature, and other critical parameters.

3. **System Monitoring:** The software provides diagnostics for different systems on the marine vessel, such as the propulsion system, electrical systems, navigation systems, and more.

4. **Calibration and Configuration:** Advanced marine diagnostic tools may allow users to calibrate and configure certain engine parameters for optimal performance. This can include adjusting fuel injection timing, optimizing fuel-air mixture, and other settings.

5. **Maintenance and Service Reminders:** Some marine diagnostic software includes features that provide maintenance and service reminders based on engine hours, usage, or other relevant factors.

6. **Manufacturer-specific Support:** Marine engines are often manufactured by different companies, and their diagnostic protocols can vary. Marine diagnostic software may offer support for specific engine brands or models.

7. **Fleet Management:** In a commercial marine context, the software can be used for fleet management to monitor the health and performance of multiple vessels, schedule maintenance, and ensure compliance with marine regulations.